Electronic Sweeping for offices and businesses

Is information leaking from your meetings? Electronic scanning for offices, boardrooms, and meeting rooms.

When a competitor jumps the gun on an offer, the other party in a negotiation learns your profit margin, or an internal conflict leaks out prematurely, the leak may have a physical origin. A GSM microphone in a boardroom power strip, a voice-activated recorder in the executive office, a transmitter in the telephone jack, or an unknown device connected to the network are all inexpensive devices, easy for anyone with access to the premises to install in minutes, and difficult to detect. TSCM's comprehensive electronic sweep examines critical company spaces for all of these devices, both those transmitting and those silently recording.

This service includes the radioelectric, thermal, optical and physical inspection of the premises, the review of the fixed telephony and networks, the explanation of the results and a legal opinion that assesses what was found and guides the company on how to act.

Who provides the service

The inspection and report are carried out by a TSCM lawyer specializing in electronic countermeasures . The engagement is formalized directly with the TSCM lawyer, who provides a quote and invoices the service. All information regarding the company and the inspection is protected by the lawyer's professional secrecy from the initial contact. ESPIAMOS® connects the company with the law firm; it does not receive any commission for this service.

To request the sweep, contact the office through their website or ask us for their contact details by phone or WhatsApp.

Why a professional sweep and not an internal check?

Current listening devices don't transmit continuously: they broadcast in bursts when they detect voice, activate at programmed times, rely on the office's own Wi-Fi network, or record to a memory device for later retrieval. A basic detector in the hands of security personnel only picks up what's being transmitted at that moment and on the bands it recognizes, and its use by internal staff presents an additional problem: if the device was installed by someone on the inside, internal verification will alert them.

• Knowledge of the adversary : the firm knows the devices that are sold to monitor an office, where they are hidden, how they transmit and how they avoid being detected.
• Professional instrumentation : spectrum analyzers, frequency detectors, nonlinear junction detector for locating switched-off electronics, thermal imaging camera, optical lens detector and cavity endoscope.
• Documented methodology : the inspection follows a defined procedure and records what has been examined and to what extent, allowing the result to be used in court or in an internal file.
• Legal criterion : the person carrying out the inspection is a lawyer, and knows what to do with what he finds without compromising the company.
• Discretion : the sweep can be carried out outside of working hours, on weekends or at night, so that only the person who commissioned it knows about it.

What does electronic sweeping for businesses and offices include?

• Preliminary interview and risk analysis with management: what information is handled, in which rooms, who has access, what has happened and since when the suspicion exists.
• Radioelectric inspection of the rooms to detect GSM, 3G, 4G, 5G, Wi-Fi, Bluetooth, DECT, LTE-M, NB-IoT, LoRa and Zigbee transmitters, with prolonged monitoring to capture intermittent emissions.
• Non-linear junction detection to locate microphones, recorders and cameras that are switched off or not transmitting.
• Optical lens detection to locate hidden cameras in light fixtures, detectors, office equipment or decorative objects.
• Thermal inspection to locate heat sources associated with hidden electronics.
• Physical and endoscopic inspection of furniture, power strips and sockets, lighting fixtures, false ceilings, ducts, technical rooms and structural elements.
• Inspection of landline telephony: terminals, sockets, wiring and communications cabinet, looking for branches or connected equipment.
• Photographic and documentary record of the inspection and findings.
• Explanation of the results to management and recommendations to strengthen the security of critical areas.
• Legal opinion signed by a lawyer, with the technical inspection report as an annex.

What does the legal opinion contribute to the company?

If a device is discovered, the technical finding is just the beginning. Who installed it, whether it was legal to do so, what legal avenues exist—criminal, civil, labor, corporate, or for violation of trade secrets—and how to preserve the evidence so it cannot be challenged later are all legal questions. And within a company, there's an additional question: was the device installed by the company itself, or by someone on its behalf, within or outside the scope of its control? The classification depends on the context.

The legal opinion answers these questions based on the inspection carried out and is drafted by the same TSCM lawyer who led it. It is the document used to file a complaint, substantiate a dismissal or legal action against a partner or manager, or demonstrate due diligence to clients, auditors, or the compliance body.

When does your company need an electronic sweep?

• Information leak : the competition or the other party in a negotiation knows what was discussed in a meeting.
• Sensitive transactions : before a negotiation, a corporate transaction, a board meeting, or a meeting with advisors.
• Internal conflicts : contentious departure of partners or managers, dismissals, corporate litigation or suspicion of disloyalty.
• New facilities : by occupying an office that others have used before, or after works or interventions by third parties in critical rooms.
• Periodic prevention : review of management offices and boardrooms on a defined schedule, as part of the information security policy.
• Previous finding : a device has already been found or removed and it is necessary to check that there are no others.

What happens if a device appears during the electronic scan?

It's the difference between hiring a technician and hiring a practicing lawyer. If a microphone, camera, recorder, or transmitter is located, the lawyer immediately informs management of what has been found and the options available to the company, and the strategy is decided right then and there.

If the company decides to file a complaint, the lawyer can directly notify law enforcement on their behalf so they can take charge of the device immediately. This ensures the chain of custody begins with the lawyer present from the outset, reducing the risk of the evidence being challenged later. If the company prefers not to file a complaint yet, or to conduct an internal investigation, the lawyer documents the discovery so that this option remains open.

What you shouldn't do, with or without a lawyer, is remove the device, tamper with it, discuss the discovery within the room, or confront the suspect. This is the natural reaction, and it's what destroys the evidence and alerts whoever installed it.

Frequently Asked Questions about TSCM Comprehensive Electronic Sweeping in Offices and Businesses

Where is the sweep performed?

In Madrid and the provincial capitals of Galicia, there is no travel cost. It is also possible in other provinces; travel costs are quoted separately.

How is the budget calculated and who handles the invoicing?

The entire service is provided by the law firm. The firm will provide a customized quote after the initial consultation, based on the number of rooms, the size of the property, the telephone and network systems to be inspected, and the scheduled time of service. The invoice, quote, engagement letter, and privacy policy are yours to keep.

Should the activity be interrupted?

No. The sweep can be carried out outside of working hours, on weekends, or at night, so that only the people who requested it are aware of it. It is possible during working hours, but it is advisable that the room be clear and free of other people's electronic devices.

Are any furniture or installation elements being dismantled?

Only when necessary to access a suspicious area, and always with prior express authorization. The lawyer reports any handling beforehand and documents it. The inspection leaves no marks or damage.

Does it detect devices that are turned off or not transmitting?

Yes. For this purpose, the nonlinear junction detector is used, which locates electronic components even when they are switched off or without a battery, along with optical lens detection and physical and endoscopic inspection.

Does it include landline telephone service?

Yes. Terminals, wall sockets, cabling, and the communications cabinet are checked to rule out any illegal connections or connected equipment. This does not include the analysis of executives' mobile phones, for which the firm offers a specific spyware detection service that can be combined with the sweep.

Can the company install devices in its own offices?

The company has the right to monitor its facilities, but with strict limits when it affects the privacy or communications of employees, partners, or visitors. If a device installed by the organization itself is found during the sweep, the report also assesses that situation and its risks.

Can entire plants or multiple locations be inspected?

Yes. The office plans the sweep in phases and by priority of stays, and can establish a program of periodic reviews with a report of each intervention.

How often should a sweep be done?

It depends on the information being handled. A quarterly review of management offices and boardrooms is standard practice, with immediate inspections in the event of problematic exits, construction work, third-party interventions, or any suspicion of leakage.

Does this service include vehicles or addresses of executives?

No, but the firm can combine them in the same order: there is a comprehensive electronic sweep for vehicles and a sweep for homes and rooms , since the surveillance of an executive is often not limited to the office.